//初始化
var a = new XMLHttpRequest();
a.open('POST','https://www.cninfo.com.cn/new/hisAnnouncement/query',true);
a.setRequestHeader('User-Agent','Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.36');
//接受响应成功做的事情
a.onreadystatechange = function(){
    if(a.status == 200){
        console.log(a.responseText);
    }
}
//发送请求send（携带的data）
a.send('pageNum=2&pageSize=30&column=szse&tabName=fulltext&plate=&stock=&searchkey=&secid=&category=&trade=&seDate=2024-10-20~2025-04-20&sortName=&sortType=&isHLtitle=true');
